Reservoir-bleeder.



No. 232. PATENTED MAR. 5, 1907'.

J. E. MOURNE' & H. J. TINSLEY.

RESERVOIR BLEEDER. APPLIUATION FILED APR.26,1906.I

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RESERVOIR BLEEDEB. APPLICATION mum AP'ILZB, 1906.

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UNITED STATES PATENT OFFICE.

JOHN E. MOURNE AND HOMER J. TIN SLEY, OF CHILLICOTHE, OHIO.

RESERVOIR-BLEEDER.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed April 26. 1906. Serial No. 313.899.

To all whom it may concern:

Be it known that we, JOHN E. MoURNE and HOMER J. TINSLEY, citizens of the United States, residing at Chillicothe, in the county of Ross and State of Ohio, have invented certain new and useful Improvements in Reservoir-Bleeders; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the 'same.

This invention is an automatic bleeder or draining device for the main reservoirs of air-brake systems.

The object of the invention is to provide a device of this character which will be simple, comparatively inexpensive, and durable in construction, and reliable, efficient, and automatic in operation.

\Vith the above and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a diagrammatic view showing the application of the improved bleeder or draining device to the main reservoir. Fig. 2 is a vertical sectional view through bleeder or draining device, showing the positions the parts assume when the pressure in the main reservoir drops below a predetermined degree. Fig. 3 is a similar view showing the parts in their normal positions.

The device is designed to automatically establish communication between the main reservoir and the atmosphere whenever the pressure in the reservoir drops below fifteen pounds or any other predetermined pressure, thus keeping the main reservoir free from water and other foreign matter, and it is adapted to be mounted by suitable brackets at a convenient point in horizontal alinement with the lowest point of the reservoir.

The device or bleeder comprises two valvecasing members or sections 1 2, which are preferably in the form of castings having a packed joint 3 between them and secured to gether by screw-studs or any other suitable fastening means. The lower casing member or section 1 is adapted to contain a watervalve and has a nipple or connection 4, which is connected by means of a union to one end of a drain or water pipe leading to the lowest point of the main reservoir. In the bottom of the casing-section 1 is prothe improved vided an apertured screw-plug 5, formed with a valve-seat 6 and with vertically-extending guide-fingers 7, projecting into the chamber 8' in said casing -section. The chamber 8 is located beneath the piston 9 of the water-valve 10, which latter is normally engaged with the seat 6 and slides between the guide-fingers 7. The piston 9 is secured upon the vertically-projecting stem 11 of the valve 10 and has around its edge or periphery spring packing-rings 12, which engage a bush or lining 13 within the casing-section 1. In the bush 13 is formed an equalizing-port 14, which when the valve 10 and its piston 9 are in their normal position (shown in Fig. 1) aflords communication between the chamber 8 and a chamber 15, located in the casing 1 above the plston 9 and beneath the casingsection 2. A light coil-spring 16 of sufiicient strength to overcome the friction of the packing-ring 12 upon the bush 13 is provided between the top of the piston 9 and the bottom of the casing-section 2 for the purpose of holding the valve 10 normally upon its seat 6, said spring having its upper end seated in a recess in the bottom of the casingsection 2 and its lower end engaged with the projecting upper end of the stem 11.

e casing-section 2 has one of its ends closed by a cap nut or plug 17, and upon its other end, which is enlarged to provide a cy lindrical chamber 18, is bolted or otherwise secured, as at 19, a cap 20, having an internally-screw-threaded outer end. The chamber 18 communicates with the chamber 21 in the casing-section 2, and in the latter is formed a port or opening 22, connected to an air-pipe leading to the upper portion of the main reservoir. Slidably mounted in the chamber 21 is an air-valve 23, which is held upon its seat by a spring 24, which engages the bush or lining 25 in the casing-section 2. Mounted so as to have a limited sliding movement in a longitudinally-extending bore or opening in the air-valve 23 is a stem 26, which has secured upon one of its ends the actuating-piston 27 of the valve 23. Said piston has around its periphery two or more spring packing-rings 28, which engage the bush or lining 29 in the cylindrical chamber 18, in which latter said piston 27 slides. Should any air escape around these packingrings 28 and into the cap 20, it escapes therefrom through a leakage-port 30, formed in said cap. Upon the end of the valve-rod 26 within the chamber 18 is provided a stopshoulder 31, which when moved into engagement with the end of the valve 23 causes the latter to move with its piston and rod in one direction under the action of a coil-spring 32, disposed in the cap 20 between the piston 27 and an adjusting-nut 33, which is engaged with the internal screw-threads in the said cap. Said spring has one of its ends engaged with the projecting end of the rod 26 and its other end seated in a recess in the nut 33. The latter, after being adjusted to regulate the tension of the regulating-spring 32, is locked in such adjusted position by a lockingnut 34, screwed upon its outer end and against the cap 20. The opposite end of the valve rod or stem 26 carries a guide 35 and a transverse pin 36, which latter secures to said rod or stem a pin-valve 37. The latter is slidably mounted in a bore or opening in the valve 23 and is adapted to open and close an inverted- U -shaped exhaust port 38, also formed in said valve 23. This port or passage 38 is adapted to afford communication between an exhaust or discharge port or passage 39, formed in the casing-section 2, and a port or passage 40, formedv in said casing-section and afl'ording communication between the chamber 15 and the chamber 21. discharge or outlet port 39 has one of its ends opening to the atmosphere and its other end, which opens into the chamber 21, controlled by the valve 23. The upper end of the communicating port 10 is also controlled by said valve, and in the latter is provided a rightangular feed port or passage 41, which equalizes the pressure in the chambers 15 and 21 when the parts are in their normal position.

The operation of the invention is as follows :W hen the parts are in their normal position (shown in Fig. 3 of the drawings) and the pressure in the main reservoir drops below fifteen pounds or any other predetermined point, according to the tension of the regulating-spring 22, the latter will force the piston 27 inwardly or to the left, carrying the stem or rod 26 and the pin-valve 37 with it, the latter opening the exhaust passage or port 38 in said valve. After the rod or stem 26 has moved a distance suflicient to open the valve 37 its shoulder 31 will engage the valve 23 and move the latter to cause the port or passage 38 to afford communication between the ports 40 and 39. This permits the air in the chamber 15 to escape through the exhaust 39 to the atmosphere, and thus reduce the pressure in said chamber, so that the piston 9 will be forced upwardly against the tension of its spring 16 and will raise the valve 10 from its seat, as shown in Fig. 2, to permit the pressure in the main reservoir to pass to the atmosphere through the connecting-pipe, the nipple or connection 4, the chamber 8, and the valve-seat 6, carrying with it all water and foreign matter. When the pressure in the reservoir lowers beyond the tension of the Theseating-spring 16, the valve 10 and its piston will again drop to their normal positions and the equalizing-port 14 will again establish communication between the chambers 8 and 15. In the meantime the piston 27 makes its full stroke to the left and engages the inner end of the chamber 18 and shifts the valve 23 to the position shown in Fig. 2. When the pump is started, air from the main reservoir enters the chambers 8 and 21 through the connection 4 and inlet 22, respectively. The pressure in the chambers 8 and 15 will hold the valve 10 upon its seat, and the pressure within the chamber 21 when it overcomes the tension of the spring 32 will move the piston 27 outwardly to its normal position and return the valves 37 and 23 to their normal positions, (shown in Fig. 3,) as will be readily understood.

It will be seen that the feed-port 411 in the slide-valve 23 is so placed that'the chamber 21 is in communication with the chamber 15 as long as there is more than fifteen pounds pressure in the main reservoir, thus providing a precautionary measure against the operation of the bleeder in the event of the equalizing-port 14 becoming stopped up.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as defined by the appended claims.

Having thus described our invention, what we claim as new, and desire to secure by Let ters Patent, is

1. In an apparatus of the character described, a main reservoir having a drain connection, a valve for controlling the latter, means for actuating said valve, a movable element actuated in one direction by the pressure in said reservoir, a spring for actuating said element in the reverse direction, and means carried by said element for controlling the operation of said valve-actuating means.

2. A device of the character described comprising a casing having communicating chambers, one of said chambers having an outlet and a drain connection, and the other an inlet connection and an exhaust-port, a valve for controlling said outlet, a pistonfor operating said valve, a valve for controlling the communication between said chambers and said exhaust-port, a piston for actuating the last-mentioned valve, and a spring for actuating the last-mentioned piston.

3. A device of the character described comprising a casing having communicating chambers, one of said chambers having an outlet and a drain connection, and the other an inlet connection and an exhaust-port, a valve for controlling said outlet, a piston for operating said valve, a valve for controlling the communication between said chambers and said exhaust-port, a piston for actuating ICC the last-mentioned valve, a spring for actuating the last-mentioned piston, and means for regulating the tension of said spring on said piston.

4. A device of the character described comprising a casing having communicating chambers, one of said chambers having an outletand a drain connection, and the other an-inlet connection and an exhaust-port, a valve for controlling said outlet, a piston upon the stem of said valve and adapted to slide in the first-mentioned chamber, the latter having an equalizing-port to equalize the pressure upon opposite sides of said piston, a s ring for actuating said valve and piston, a slide-valvein the other of said chambers having a feed-passage and an exhaust-passage to coact with said exhaust-port and the passage affording communication between said chambers, a stem having a limited sliding movement in said slide-valve, a valve carried by said stern and slidable in said slidevalve to open and close said exhaust-passage, a piston upon the stem of said slide-valve, a spring for actuating the last-mentioned stem and iston in one direction, and means for regu ating the tension of the last-mentioned spring, substantially as described.

In testimony whereof We have hereunto set our hands in presence of two subscribing witnesses.

JOHN E. MOURNE. HOMER J. TINSLEY. Witnesses:

LoUIs M. DAY, JAMES A. CAHILL. 

